Singapore Flood Alerts
Track official Singapore flood alerts, affected locations, and cleared notices.
Check official flood alerts by date or time
Leave the time blank to review every flood alert issued on the selected day. Add a time when you want the alert situation up to a specific cut-off.
Open flood alerts
Alert timeline
| Issued at | Status | Area | Headline | Severity | Expires | Details |
|---|---|---|---|---|---|---|
| Loading flood alerts... | ||||||
About this tool
This tool helps you monitor official flood alerts issued across Singapore by PUB through the data.gov.sg real-time API. Instead of searching through raw JSON, you can review the latest warning, the affected road or junction, the expected expiry time, and the message that was broadcast to the public in a single view.
Flood alerts are operational notices. They are usually issued when flash floods, ponding, or fast-changing drainage conditions make a road unsafe or difficult to pass. The alert feed also carries cancellation notices, which are important because every created flood alert should have a corresponding cancel notice after the water subsides and the location becomes passable again.
Because the source API accepts either a full date or an ISO 8601 date-time, this page is useful for both real-time checking and historical review. You can check the current day to see whether there are any active warnings, or choose a past date and time to understand when an alert was first issued, how long it lasted, and when the official all-clear was sent.
How to use
- Choose a date to load all flood alerts issued on that day.
- Optionally enter a time if you only want alerts up to a particular moment, such as during your commute or a past heavy rain event.
- Press Load Alerts to refresh the summary cards, open-alert panel, and event timeline.
- Check the Open Flood Alerts section first. It shows locations whose latest notice in the selected window is still an active warning instead of a cancellation.
- Use the Alert Timeline to see the exact order of alert and cancel notices, including the original warning message, severity, expiry, and public instructions.
Key terms and concepts
Flood alert
A flood alert is the warning notice sent when PUB identifies a location with flooding or unsafe water conditions. It usually tells motorists and pedestrians to avoid the affected road, lane, or junction.
Cancel alert
A cancel alert is the follow-up notice that indicates the flood has subsided. Reviewing both the original alert and the cancellation gives you a clearer picture of duration and recovery time.
Cut-off time
The API can return alerts up to a specific time on a selected day. This matters when you want to reconstruct what the situation looked like during a storm, not just at the end of the day.
Severity and urgency
Severity describes the seriousness of the event, while urgency reflects how quickly the public should act. Together they help explain whether a notice is mainly informational or requires immediate route changes.
Affected area
The affected area is the road segment, avenue, junction, or nearby landmark referenced in the alert. Use it to decide whether your route, delivery run, school trip, or site visit could be disrupted.
Common use cases
- ✓ Drivers can check whether a flash flood warning affects a regular commuting route before leaving home or the office.
- ✓ Parents and caregivers can review alert history before picking children up during intense rain or thunderstorm periods.
- ✓ Logistics teams can verify whether a road closure warning overlaps with delivery routes and dispatch alternatives sooner.
- ✓ Property managers and field teams can document when warnings started and when they were cancelled after a heavy rain event.
- ✓ Journalists and researchers can review official timestamps for flood-related incidents without querying the raw API manually.
- ✓ Residents can monitor whether ponding in a familiar area became a formal public flood alert or remained only a weather observation.
Examples
Morning commute check
Select today’s date and the current time before driving to work. If a road such as Wan Tho Avenue appears as an open alert, you can detour before you get stuck in traffic or standing water.
Historical storm review
Choose a past date with heavy rainfall to see when the first flood warning was issued, when the warning expired, and whether a cancellation notice was subsequently published.
Operational reporting
Teams preparing post-incident notes can use the timeline table to capture official messages, issue times, and cancellation times for internal summaries or service reviews.
Important notes
Official source
All data shown here comes from the Singapore government’s open data platform and reflects PUB public notices. The tool does not create its own flood assessment.
Empty results
An empty timeline does not mean the page is broken. It simply means there were no flood alert notices in the selected window, even though the API may still publish routine observation records.
Active versus historical
The Open Flood Alerts panel is based on the latest notice for each affected area in the selected result window. If the latest notice is a cancellation, that location is treated as cleared.
Routing decisions
Use this tool as a situational awareness aid, but always follow on-site signs, police instructions, and real-world road conditions because flooding can change quickly during intense rain.
Caching
The backend caches responses briefly to reduce repeated upstream requests while still keeping near-real-time visibility for current-day checks.
Frequently asked questions
How current is the data on this page?
The page uses the official real-time flood alerts API from data.gov.sg and caches results for a short period. For current-day queries, that means you usually see near-real-time PUB notices without repeatedly calling the upstream service for every refresh.
What happens if there are no alerts today?
If there are no alerts today, the tool will show zero open alerts and an empty timeline. That means PUB did not issue a public flood warning for the selected date or time window.
Why does the tool mention cancellation notices?
Cancellation notices matter because they show when an affected location was officially cleared. The flood alerts dataset states that every created flood alert should have a corresponding cancel alert once the flood has subsided.
Can I search historical flood events?
Yes. Enter a past date to load every flood alert issued on that day, or add a time to recreate the alert situation up to a specific cut-off. This is useful for reviews, reporting, and incident analysis.
Does an alert mean the entire neighbourhood is flooded?
Not necessarily. Most notices reference a specific road segment, junction, or localised area. Read the affected-area text carefully because the alert may apply to only one stretch of road rather than the whole district.
Who issues the notices in this dataset?
The notices are sent by PUB and published through Singapore’s open government data platform. This page republishes the official message, timing, and metadata in a more readable format.
Should I rely only on this tool when deciding whether to drive?
No. This tool is helpful for advance awareness, but you should still follow live road conditions, police directions, traffic updates, and any barriers placed on-site because floods can worsen or clear rapidly.
Why can the selected time change the open-alert count?
The selected time changes the cut-off for the API response. If a cancellation notice was issued after your chosen time, the alert may still appear open in the tool because, at that historical moment, the all-clear had not yet been published.